When I was a lot younger my dad had me helping to reload shotgun cartridges using a thing that clamped onto a table top, and on top of the table clamp was a sort of vertical G clamp with threads at both ends and a handle at the top.
To reload different calibres you screwed a different base into the bottom end, and the corresponding turnover tool into the top end with the handle and turned the handle to move the roll crimp thingy down until the turnover was done.

Those bits look very similar to me, apart from it doesn't have "patina" from years of use